Microsoft server president Bob Muglia late this week confirmed a broader shift at the company away from Silverlight on the web and towards HTML5. Silverlight was now primarily the development platform for Windows Phone 7, but more cross-platform efforts would rely on the more universal standard. Muglia stressed to ZDNet that Silverlight would still run on Macs and (indirectly) Linux systems, but HTML5 was the only guarantee of support for the iPhone and Pad.